Caterpillars of Eastern Forests

Slug Caterpillars (Family Limacodidae)

Slug caterpillars are the most morphologically diverse and oddest appearing
group of caterpillars in North America. Despite their highly variable body
plan, slug caterpillars may be readily recognized by an examination of their
venter. Instead of paired abdominal prolegs, they have medial suckers on the
first 7 abdominal segments, which lack both prolegs and crochets. Their heads
are often hidden from view, retracted well into the thorax. Many species have
urticating spines, which in a few, can deliver a very painful sting. They
are broadly polyphagous but show a preference for smooth-leafed trees and
shrubs.